SGL CARBON AG Patent applications |
Patent application number | Title | Published |
20110316179 | PROCESSES FOR PRODUCING A POLYMER-BONDED FIBER AGGLOMERATE AND A FIBER-REINFORCED COMPOSITE MATERIAL - A polymer-bonded fiber agglomerate includes short fibers selected from carbon, ceramic materials, glasses, metals and organic polymers, and a polymeric bonding resin selected from synthetic resins and thermoplastics. The fiber agglomerates have an average length, measured in the fiber direction, of from 3 mm to 50 mm and an average thickness, measured perpendicularly to the fiber direction, of from 0.1 mm to 10 mm. At least 75% of all of the contained fibers have a length which is at least 90% and not more than 110% of the fiber agglomerate average length. A fiber-reinforced composite material having the fiber agglomerate and processes for the production thereof are also provided. | 12-29-2011 |
20100024439 | Cooling Device - A cooling device is in the form of a refrigerator or a point-of-sale display cabinet that is open on one side and is used to store and present perishable goods. The device is fitted with a unit for lowering the interior temperature in relation to the ambient temperature. The inner wall is constructed in two stages, the outer layer consisting of a thermal insulation layer having a heat conductivity <1 Watt/K, and the inner layer consisting of an at least partially coated mixture consisting of a phase transition material and graphite, which covers at least part of the inner wall and is used as a cold accumulator layer. | 02-04-2010 |
20090239434 | METHOD FOR PRODUCING A FIBER-REINFORCED CARBIDE CERAMIC COMPONENT AND CARBIDE CERAMIC COMPONENT - A method of producing a fiber-reinforced carbide-ceramic component includes producing a carbonaceous article from at least one unidirectional tape by pyrolysis, infiltrating the carbonaceous article with carbide former, and coating the at least one unidirectional tape with a coating material being volatile in pyrolysis and/or providing the at least one unidirectional tape with a transverse thread system including transverse threads composed of a material being volatile in pyrolysis. A fiber-reinforced carbide ceramic component is also provided. | 09-24-2009 |
20090130442 | Expanded Graphite and Process for Producing the Expanded Graphite - An expanded graphite is derived from a graphitic or partially graphitic starting material selected from the group consisting of natural graphite, compressed expanded graphite, partially oxidized graphite and/or graphite fibers having a BET surface area of >30 m | 05-21-2009 |
20090092527 | SUPPORT GRID FOR FILLING MATERIAL PACKINGS AND METHOD FOR MOUNTING THE SUPPORT GRID - A support grid for filling material packings includes plate-shaped support strips which extend perpendicularly to an installation plane and are connected in a cruciform manner to spacer strips also extending perpendicularly to the installation plane. Contour strips which are provided with openings and are disposed at an angle and at a distance from one another, are placed in the direction of the spacer strips. The size of the openings as well as the distances are selected in such a way that supported filling material cannot penetrate. The maximum cross-section of the openings amounts to 90 percent. A method for mounting a support grid for filling material packings, is also provided. | 04-09-2009 |
20090052117 | Carbonized Biopolymers and Carbonization Process - A carbon material suitable for the preparation of electrodes for electrochemical capacitors is obtained by single-stage carbonization of biopolymers with a large content of heteroatoms. Neither addition of an activating agent during carbonization nor subsequent gas phase activation is necessary. Several biopolymers which are available by extraction from seaweed are suitable precursors. Alternatively, the seaweed containing such biopolymers is carbonized directly. | 02-26-2009 |
20090050474 | Cathodes for Aluminum Electrolysis Cell with Non-Planar Slot Configuration - Cathodes for aluminum electrolysis cells are formed of cathode blocks and current collector bars attached to those blocks. The cathode block has a cathode slot for receiving the collector bar and has a higher depth at a center than at both lateral edges of the cathode block. Additionally, the collector bar thickness is higher at the center than at both lateral edges of the cathode block. This cathode configuration provides a more even current distribution and, thus, a longer useful lifetime of such cathodes and increases cell productivity. | 02-26-2009 |
20090007723 | METHOD FOR USING FRACTURE RESISTANT ELECTRODES IN A CARBOTHERMIC REDUCTION FURNACE - Graphite electrodes for the production of aluminum by carbothermic reduction of alumina are either submerged in the molten bath in the low temperature compartment or they are horizontally arranged in the side walls of the high temperature compartment. The electrodes are manufactured by using a mixture of coke particles covering the complete particle size range between 25 μm to 3 mm and by using an intensive mixer to effectively wet all coke particles with pitch. The electrodes have a flexural strength of at least 20 N/mm | 01-08-2009 |
20090000425 | Graphite Electrode for Electrothermic Reduction Furnaces, Electrode Column, and Method of Producing Graphite Electrodes - A graphite electrode for an electrothermic reduction furnace is formed from anode grade coke and graphitized at a graphitization temperature below 2700° C. The resulting electrode is particularly suited for carbothermal reduction of alumina. It has an iron content of about 0.05% by weight, a specific electrical resistivity of above 5 μOhm·m, and a thermal conductivity of less than 150 W/m·K. The graphite electrode is manufactured by first mixing calcined anode coke with a coal-tar pitch binder, and a green electrode is formed from the mixture at a temperature close to the softening point of the pitch binder. The green electrode is then baked to carbonize the pitch binder to solid coke. The resultant carbonized electrode, after further optional processing is then graphitized at a temperature below 2700° C. for a time sufficient to cause the carbon atoms in the carbonized electrode to organize into the crystalline structure of graphite. | 01-01-2009 |
20080318050 | Latent Heat Storage Material - A latent heat storage material is formed of at least two plies of a compressible graphitic material in which graphite wafers are arranged substantially in layer planes lying one on the other and which is infiltrated with at least one phase change material. The surface of each ply being provided with a structuring reaching the outsides of the graphite material. The evacuation and infiltration travel lengths in the layer planes, due to the structuring, amounts to a maximum of 200 mm. | 12-25-2008 |
20080317085 | Lining for Carbothermic Reduction Furnace - An inner lining for the steel shell of a carbothermic reduction furnace for the production of alumina has a base layer of graphite and a coating layer of refractory material. The refractory material is corundum (Al | 12-25-2008 |
20080308415 | Cathodes for Aluminum Electrolysis Cell with Expanded Graphite Lining - Cathodes for aluminum electrolysis cells are formed of cathode blocks and current collector bars attached to those blocks. The cathode slots receiving the collector bar are lined with expanded graphite lining thus providing longer useful lifetime of such cathodes and increased cell productivity. The expanded graphite provides a good electrical and thermal conductivity especially with its plane layer. | 12-18-2008 |
20080304537 | Threaded Pin, Carbon Electrode, and Electrode Assembly - Carbon electrodes have at least one socket with an internal thread to be mated with a threaded pin having at least one external thread. Also such a threaded pin is provided for connecting to such carbon electrodes. The internal thread or external thread of the carbon electrodes and/or the pins are provided with non-load bearing abutment thread windings. | 12-11-2008 |
20080237058 | Method for Producing Aluminum and Method for Producing a Gas-Tight Electrode for Carbothermic Reduction Furnace - A method for producing aluminum and a method for producing a graphite electrode for a carbothermic reduction furnace, in which aluminum is produced by carbothermic reduction of alumina, render the graphite electrode substantially gas-impermeable. The graphite electrode is consumed during furnace operation and electrode columns connected by graphite pins are fed continuously fed in from the top into the furnace. The coating of the electrode withstands a temperature of up to 300° C. and more over a period of several hours without oxidation. Since the coating enters the furnace compartment at least partially, it is configured so that it will not contaminate the hot melt. That is, the chemistry of the coating materials is similar to the ingredients of the overall reaction or, at a minimum, the amount of foreign elements is very low. The coating is provided so that it does not increase the electrical contact resistance at the connection between the electrode columns and the electrode holding clamps. Where the electrode inlet area is cooled by water, the coating is insoluble in water. | 10-02-2008 |
20080209852 | Joining Assembly and Method for Joining Components - A joining assembly includes metallic, ceramic, polymeric and/or fiber-reinforced components, which have at least one joining surface with at least one recess and/or raised area with an undercut. The joining assembly also includes a joining element that conforms in size and shape to the recess and/or the raised area of the components to be joined and has at least one flexible rim area. The flexible rim area can be placed in a form-locking and force-locking interconnection with the recesses and/or raised areas of the components to be joined. A method for joining components is also provided. | 09-04-2008 |
20080202867 | Bicycle Disk Brake Rotor - A bicycle disk brake rotor which is rigidly joined to the hub and can be brought into a frictional engagement with a caliper secured to the bicycle. The rotor has an inner annular region, which is joined positively and nonpositively to the hub, and an outer annular region, while the inner and outer annular region are connected by webs and the bicycle disk brake is made entirely of composite material consisting of silicon-infiltrated carbon fiber composite of a fabric structure consisting of endless fibers with a phase distribution of >60% C and 20-30% SiC. | 08-28-2008 |